Guidance mechanism for a subcaliber-sized fin-stabilized practice projectile

Abstract

A guidance mechanism for a subcaliber-sized fin-stabilized practice projectile including wings or vanes which are radially fixedly arranged on the shank of the projectile. The wings or vanes possess auxiliary vanes which extend transversely of their main axes, and wherein a hole which is produced in a target board by the fin-stabilized practice projectile corresponds, in general, with the diameter of a circle about which the auxiliary vanes are located on the projectile.

What is claimed is: 
     
       1. A guidance mechanism for a subcaliber fin-stabilized practice projectile comprising a plurality of radial vanes fastened circumferentially spaced on a cylindrical body of said guidance mechanism, each of said radial vanes mounting auxiliary vanes extending transversely of the main radial axis of each of said radial vanes, said auxiliary vanes on adjacently arranged radial vanes being alternatingly axially offset by a predetermined distance relative to each other. 
     
     
       2. A guidance mechanism as claimed in claim 1, wherein said auxiliary vanes have sharpened leading edges with oblique surfaces facing an oncoming airflow directed against said guidance mechanism. 
     
     
       3. A guidance mechanism as claimed in claim 1, wherein said auxiliary vance are constituted from a band of a high-strength spring steel. 
     
     
       4. A guidance mechanism as claimed in claim 1, wherein the distance between the neighboring ends of auxiliary wings mounted on adjacent of said radial vanes is zero measured in the circumferential direction of said auxiliary vanes. 
     
     
       5. A guidance mechanism as claimed in claim 1, wherein the auxiliary vanes extend from the opposite sides of each of said radial vanes, each said auxiliary vane being constituted from a single piece, each said piece being form-fittingly and load-transmissively fastened in an opening formed in each respective radial vane. 
     
     
       6. A guidance mechanism as claimed in claim 5, wherein each said piece includes a protuberance along a symmetrical line positioned at one end within said opening with excess material on both sides of said opening and a cutout in said piece engaging the other end of said opening; and inclines on the protuberance and in the cutout being asymmetrically arranged along a single line diagonally opposite each other.